Here is the full list of all 38 Mark of the Ninja: Remastered achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete the game in New Game Plus.
Complete a level without killing any guards and without being detected.
Earn three stars in every level.
Find all three scrolls in every level.
Complete all of the challenge rooms.
Earn all three seals in every level.
Earn all of the upgrades.
Terrify a guard and cause him to stumble to his death.
Distract 25 guards using your equipment.
Kill a guard from inside the box.
Determine your fate.
Stealth kill a guard from inside a dumpster.
Escape from the Stronghold.
Read one of the history lesson developer commentaries.
View any of the developer commentaries.
Complete a level without killing any guards.
Complete one of the original Mark of the Ninja levels using the Path of Wisdom.
Assassinate Karajan.
Stun an elite guard with moths then dispatch him.
Stealth kill an elite guard after stunning him.
Perform five different types of stealth kills in one level.
Terrify a guard with a hanging stealth kill five times.
Assassinate Kelly, the mercenary captain.
Dispatch two enemies at once using a body infected with Toxic Fungus.
Get the Undetected bonus 10 times in one level.
Terrorize 10 guards.
Disable a spotlight using the Dusk Moths.
Complete Dosan's Tale.
Kill a guard by getting other guards to shoot him.
Within a single Focus, aim and throw three different types of items.
Knock out an enemy again that was revived from being knocked out.
Throw the body of one guard to terrorize another.
Complete a level without getting detected.
Use a dead body to lure another guard and then stealth kill him.
Distract 25 guards using environmental objects.
Perform 25 successful stealth kills.
Save Azai from the mercenaries.
Kill one guard.